1 //====- ARMMachineFuctionInfo.h - ARM machine function info -----*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file declares ARM-specific per-machine-function information. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #ifndef ARMMACHINEFUNCTIONINFO_H 15 #define ARMMACHINEFUNCTIONINFO_H 16 17 #include "ARMSubtarget.h" 18 #include "llvm/CodeGen/MachineFunction.h" 19 #include "llvm/Target/TargetRegisterInfo.h" 20 #include "llvm/Target/TargetMachine.h" 21 #include "llvm/ADT/BitVector.h" 22 23 namespace llvm { 24 25 /// ARMFunctionInfo - This class is derived from MachineFunction private 26 /// ARM target-specific information for each MachineFunction. 27 class ARMFunctionInfo : public MachineFunctionInfo { 28 29 /// isThumb - True if this function is compiled under Thumb mode. 30 /// Used to initialized Align, so must precede it. 31 bool isThumb; 32 33 /// hasThumb2 - True if the target architecture supports Thumb2. Do not use 34 /// to determine if function is compiled under Thumb mode, for that use 35 /// 'isThumb'. 36 bool hasThumb2; 37 38 /// Align - required alignment. ARM functions and Thumb functions with 39 /// constant pools require 4-byte alignment; other Thumb functions 40 /// require only 2-byte alignment. 41 unsigned Align; 42 43 /// VarArgsRegSaveSize - Size of the register save area for vararg functions. 44 /// 45 unsigned VarArgsRegSaveSize; 46 47 /// HasStackFrame - True if this function has a stack frame. Set by 48 /// processFunctionBeforeCalleeSavedScan(). 49 bool HasStackFrame; 50 51 /// LRSpilledForFarJump - True if the LR register has been for spilled to 52 /// enable far jump. 53 bool LRSpilledForFarJump; 54 55 /// R3IsLiveIn - True if R3 is live in to this function. 56 /// FIXME: Remove when register scavenger for Thumb is done. 57 bool R3IsLiveIn; 58 59 /// FramePtrSpillOffset - If HasStackFrame, this records the frame pointer 60 /// spill stack offset. 61 unsigned FramePtrSpillOffset; 62 63 /// GPRCS1Offset, GPRCS2Offset, DPRCSOffset - Starting offset of callee saved 64 /// register spills areas. For Mac OS X: 65 /// 66 /// GPR callee-saved (1) : r4, r5, r6, r7, lr 67 /// -------------------------------------------- 68 /// GPR callee-saved (2) : r8, r10, r11 69 /// -------------------------------------------- 70 /// DPR callee-saved : d8 - d15 71 unsigned GPRCS1Offset; 72 unsigned GPRCS2Offset; 73 unsigned DPRCSOffset; 74 75 /// GPRCS1Size, GPRCS2Size, DPRCSSize - Sizes of callee saved register spills 76 /// areas. 77 unsigned GPRCS1Size; 78 unsigned GPRCS2Size; 79 unsigned DPRCSSize; 80 81 /// GPRCS1Frames, GPRCS2Frames, DPRCSFrames - Keeps track of frame indices 82 /// which belong to these spill areas. 83 BitVector GPRCS1Frames; 84 BitVector GPRCS2Frames; 85 BitVector DPRCSFrames; 86 87 /// SpilledCSRegs - A BitVector mask of all spilled callee-saved registers. 88 /// 89 BitVector SpilledCSRegs; 90 91 /// JumpTableUId - Unique id for jumptables. 92 /// 93 unsigned JumpTableUId; 94 95 unsigned ConstPoolEntryUId; 96 97 public: 98 ARMFunctionInfo() : 99 isThumb(false), 100 hasThumb2(false), 101 Align(2U), 102 VarArgsRegSaveSize(0), HasStackFrame(false), 103 LRSpilledForFarJump(false), R3IsLiveIn(false), 104 FramePtrSpillOffset(0), GPRCS1Offset(0), GPRCS2Offset(0), DPRCSOffset(0), 105 GPRCS1Size(0), GPRCS2Size(0), DPRCSSize(0), 106 GPRCS1Frames(0), GPRCS2Frames(0), DPRCSFrames(0), 107 JumpTableUId(0), ConstPoolEntryUId(0) {} 108 109 explicit ARMFunctionInfo(MachineFunction &MF) : 110 isThumb(MF.getTarget().getSubtarget<ARMSubtarget>().isThumb()), 111 hasThumb2(MF.getTarget().getSubtarget<ARMSubtarget>().hasThumb2()), 112 Align(isThumb ? 1U : 2U), 113 VarArgsRegSaveSize(0), HasStackFrame(false), 114 LRSpilledForFarJump(false), R3IsLiveIn(false), 115 FramePtrSpillOffset(0), GPRCS1Offset(0), GPRCS2Offset(0), DPRCSOffset(0), 116 GPRCS1Size(0), GPRCS2Size(0), DPRCSSize(0), 117 GPRCS1Frames(32), GPRCS2Frames(32), DPRCSFrames(32), 118 SpilledCSRegs(MF.getTarget().getRegisterInfo()->getNumRegs()), 119 JumpTableUId(0), ConstPoolEntryUId(0) {} 120 121 bool isThumbFunction() const { return isThumb; } 122 bool isThumb2Function() const { return isThumb && hasThumb2; } 123 124 unsigned getAlign() const { return Align; } 125 void setAlign(unsigned a) { Align = a; } 126 127 unsigned getVarArgsRegSaveSize() const { return VarArgsRegSaveSize; } 128 void setVarArgsRegSaveSize(unsigned s) { VarArgsRegSaveSize = s; } 129 130 bool hasStackFrame() const { return HasStackFrame; } 131 void setHasStackFrame(bool s) { HasStackFrame = s; } 132 133 bool isLRSpilledForFarJump() const { return LRSpilledForFarJump; } 134 void setLRIsSpilledForFarJump(bool s) { LRSpilledForFarJump = s; } 135 136 // FIXME: Remove when register scavenger for Thumb is done. 137 bool isR3LiveIn() const { return R3IsLiveIn; } 138 void setR3IsLiveIn(bool l) { R3IsLiveIn = l; } 139 140 unsigned getFramePtrSpillOffset() const { return FramePtrSpillOffset; } 141 void setFramePtrSpillOffset(unsigned o) { FramePtrSpillOffset = o; } 142 143 unsigned getGPRCalleeSavedArea1Offset() const { return GPRCS1Offset; } 144 unsigned getGPRCalleeSavedArea2Offset() const { return GPRCS2Offset; } 145 unsigned getDPRCalleeSavedAreaOffset() const { return DPRCSOffset; } 146 147 void setGPRCalleeSavedArea1Offset(unsigned o) { GPRCS1Offset = o; } 148 void setGPRCalleeSavedArea2Offset(unsigned o) { GPRCS2Offset = o; } 149 void setDPRCalleeSavedAreaOffset(unsigned o) { DPRCSOffset = o; } 150 151 unsigned getGPRCalleeSavedArea1Size() const { return GPRCS1Size; } 152 unsigned getGPRCalleeSavedArea2Size() const { return GPRCS2Size; } 153 unsigned getDPRCalleeSavedAreaSize() const { return DPRCSSize; } 154 155 void setGPRCalleeSavedArea1Size(unsigned s) { GPRCS1Size = s; } 156 void setGPRCalleeSavedArea2Size(unsigned s) { GPRCS2Size = s; } 157 void setDPRCalleeSavedAreaSize(unsigned s) { DPRCSSize = s; } 158 159 bool isGPRCalleeSavedArea1Frame(int fi) const { 160 if (fi < 0 || fi >= (int)GPRCS1Frames.size()) 161 return false; 162 return GPRCS1Frames[fi]; 163 } 164 bool isGPRCalleeSavedArea2Frame(int fi) const { 165 if (fi < 0 || fi >= (int)GPRCS2Frames.size()) 166 return false; 167 return GPRCS2Frames[fi]; 168 } 169 bool isDPRCalleeSavedAreaFrame(int fi) const { 170 if (fi < 0 || fi >= (int)DPRCSFrames.size()) 171 return false; 172 return DPRCSFrames[fi]; 173 } 174 175 void addGPRCalleeSavedArea1Frame(int fi) { 176 if (fi >= 0) { 177 int Size = GPRCS1Frames.size(); 178 if (fi >= Size) { 179 Size *= 2; 180 if (fi >= Size) 181 Size = fi+1; 182 GPRCS1Frames.resize(Size); 183 } 184 GPRCS1Frames[fi] = true; 185 } 186 } 187 void addGPRCalleeSavedArea2Frame(int fi) { 188 if (fi >= 0) { 189 int Size = GPRCS2Frames.size(); 190 if (fi >= Size) { 191 Size *= 2; 192 if (fi >= Size) 193 Size = fi+1; 194 GPRCS2Frames.resize(Size); 195 } 196 GPRCS2Frames[fi] = true; 197 } 198 } 199 void addDPRCalleeSavedAreaFrame(int fi) { 200 if (fi >= 0) { 201 int Size = DPRCSFrames.size(); 202 if (fi >= Size) { 203 Size *= 2; 204 if (fi >= Size) 205 Size = fi+1; 206 DPRCSFrames.resize(Size); 207 } 208 DPRCSFrames[fi] = true; 209 } 210 } 211 212 void setCSRegisterIsSpilled(unsigned Reg) { 213 SpilledCSRegs.set(Reg); 214 } 215 216 bool isCSRegisterSpilled(unsigned Reg) const { 217 return SpilledCSRegs[Reg]; 218 } 219 220 const BitVector &getSpilledCSRegisters() const { 221 return SpilledCSRegs; 222 } 223 224 unsigned createJumpTableUId() { 225 return JumpTableUId++; 226 } 227 228 unsigned getNumJumpTables() const { 229 return JumpTableUId; 230 } 231 232 void initConstPoolEntryUId(unsigned UId) { 233 ConstPoolEntryUId = UId; 234 } 235 236 unsigned getNumConstPoolEntries() const { 237 return ConstPoolEntryUId; 238 } 239 240 unsigned createConstPoolEntryUId() { 241 return ConstPoolEntryUId++; 242 } 243 }; 244 } // End llvm namespace 245 246 #endif // ARMMACHINEFUNCTIONINFO_H 247